FLUX 3 Video Extend Draft: AI Video Editor

Fast, lower-cost draft mode of FLUX 3 Video Extend for testing continuity and camera movement. Try free — pay per generation, no subscription. FLUX 3 Video Extend Draft is a fast, lower-cost draft mode for testing continuity, camera movement, and visual consistency before extending a clip with FLUX 3 Video Extend.

Interactive model controls

FLUX 3 Video Extend Draft is a fast, lower-cost draft mode for testing continuity, camera movement, and visual consistency before extending a clip with FLUX 3 Video Extend.

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Overview

About this model

FLUX 3 Video Extend Draft is a fast, lower-cost draft mode for testing continuity, camera movement, and visual consistency before extending a clip with FLUX 3 Video Extend. It generates a prompt-guided draft extension of an existing MP4 clip, letting you validate the direction of a continuation before spending on the full-quality version.

1Continuity Testing: Preview how a scene will continue before committing to a final render.

2Prompt Iteration: Test different continuation prompts quickly and cheaply.

3Storyboarding: Rough out multi-shot sequences before final production.

4Client Previews: Share fast, low-cost extension drafts for early feedback.

5Batch Exploration: Generate several continuation directions affordably before picking one.

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Pricing & Value

Cost analysis

Provider	Cost	Notes
muapiapp	$0.09/sec flat	Pay-per-generation pricing, no subscription required. Audio generation included at no extra charge.
Fal.ai	Not available	FLUX 3 Video Extend Draft is not yet listed on Fal.ai.
Replicate	Not available	FLUX 3 Video Extend Draft is not yet listed on Replicate.

muapiapp$0.09/sec flat

Pay-per-generation pricing, no subscription required. Audio generation included at no extra charge.

Fal.aiNot available

FLUX 3 Video Extend Draft is not yet listed on Fal.ai.

ReplicateNot available

FLUX 3 Video Extend Draft is not yet listed on Replicate.

** Competitor pricing is estimated based on similar model architectures and usage tiers.

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Technical Details

Configuration schema

Parameter	Type	Description	Default
Prompt	string	Describe the next action, scene development, camera movement, mood, lighting, and visual continuity.	`The camera pulls back to reveal a sunrise breaking over the skyline, birds taking flight.`
Video URL	string	URL of the source video to extend. Must be under 50 MB and under 15 seconds.	`https://d3adwkbyhxyrtq.cloudfront.net/webassets/videomodels/flux-3-video.mp4`
Aspect Ratio	Enum (6 options)	Aspect ratio of the output video.	`-`
Duration	int	Draft extension length in seconds.	`5`
Generate Audio	boolean	Whether to generate synchronized native audio for the draft extension.	`true`

Promptstring

Describe the next action, scene development, camera movement, mood, lighting, and visual continuity.

Default ValueThe camera pulls back to reveal a sunrise breaking over the skyline, birds taking flight.

Video URLstring

URL of the source video to extend. Must be under 50 MB and under 15 seconds.

Default Valuehttps://d3adwkbyhxyrtq.cloudfront.net/webassets/videomodels/flux-3-video.mp4

Aspect RatioEnum (6 options)

Aspect ratio of the output video.

Default Value-

Durationint

Draft extension length in seconds.

Default Value5

Generate Audioboolean

Whether to generate synchronized native audio for the draft extension.

Default Valuetrue

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Implementation Guide

Developer documentation

How to Use FLUX 3 Video Extend Draft

Provide a source video — an MP4 under 50 MB and under 15 seconds, via video_url.
Write a continuation prompt — describe the next action, scene development, camera movement, mood, lighting, and visual continuity.
Set duration for the draft extension (5–20 seconds).
Toggle generate_audio for synchronized native audio at no extra charge.
Submit the request:

curl -X POST https://api.muapi.ai/api/v1/flux-3-video-extend-draft \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt": "The camera pulls back to reveal a sunrise breaking over the skyline", "video_url": "https://example.com/clip.mp4", "duration": 5, "generate_audio": true}'

Poll /api/v1/predictions/{request_id}/result until completed, then re-run the winning direction on FLUX 3 Video Extend for a final-quality extension.

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Common Questions

Frequently asked

What is FLUX 3 Video Extend Draft?

A fast, lower-cost draft mode of FLUX 3 Video Extend, for testing continuity, camera movement, and visual consistency before a final-quality extension.

What are the source video requirements?

The source clip must be an MP4 under 50 MB and under 15 seconds long, same as the standard Video Extend endpoint.

How much does FLUX 3 Video Extend Draft cost?

Muapi bills $0.09/second flat, rounded up to the next whole second, capped at 20 seconds — a 5-second draft extension costs $0.45.

Does the draft extension generate audio?

Yes, synchronized native audio for the extended portion can be toggled with `generate_audio` at no extra charge.

Can I chain multiple draft extensions?

Yes — feed the output back in as the `video_url` of the next call, then finalize the winning direction with [FLUX 3 Video Extend](/playground/flux-3-video-extend).